高密度初植杨树无性系间生物量及热值差异性

Biomass and Calorific Value Differences among High-density Poplar Clones with Initial Planting

为探讨高密度条件下,杨树无性系间生物量、灰分质量分数及热值差异,选用1年生的7个杨树无性系,对各组织器官以及单株的生物量及能量差异进行了测定及综合评价分析。结果表明:高密度条件下,生长量和生物量均较优的无性系分别是I-69、XL-90和LA09-N56。其中I-69在常规造林条件下,生长一般,在高密度条件下却能表现出生长量和生物量较高的特性。7个杨树无性系中灰分质量分数与热值差异显著,I-69的灰分质量分数最低且单株平均热值最大,其次是XL-90,其灰分质量分数也较低,热值仅次于I-69。同一无性系不同组织器官的灰分质量分数和热值也存在着显著差异,且各无性系的叶片的灰分质量分数和热值均较高,其他器官因无性系不同而呈现出不同的分布规律。通过对供试无性系综合评价分析,初步得出,无性系XL-90、I-69和LA09-N56具有适合高密度栽培能源林的潜质,进一步丰富了杨树能源开发利用的基础材料。

In order to investigate the biomass,ash content and calorific value differences among poplar clones at high density,the biomass and energy differences of organs and individual plants of 7 one-year-old poplar clones were measured and comprehensively evaluated.The clones with good growth and biomass at high density were I-69,XL-90,and LA09-N56,respectively.Among them,I-69 grew generally under the condition of conventional afforestation,but under the condition of high density,it can show the characteristics of high growth and biomass.The ash content and calorific value of the 7 poplar clones were significantly different.The ash content of I-69 was the lowest and the average calorific value of the single plant was the highest,and the other was XL-90,the ash content was low,and the calorific value was next to I-69.There were also significant differences in ash content and calorific value of different tissues and organs of the same clone,and the ash content and calorific value of the leaf were the highest.Through the comprehensive evaluation and analysis of the tested clones,it is preliminarily concluded that clonal XL-90,I-69 and LA09-N56 have the potential to be suitable for high-density cultivation of energy forest,and further enrich the basic materials for poplar energy development and utilization.